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Added more troubleshooting points.
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To see where the <tt>pip</tt> command is installing a python package from, you can tell it to be more verbose with the <tt>-vvv</tt> option. | To see where the <tt>pip</tt> command is installing a python package from, diagnosing installation issues, you can tell it to be more verbose with the <tt>-vvv</tt> option. It also worth mentioning that when installing multiple packages it is advisable to install them with one command as it helps pip resolve dependencies. | ||
==== Installing dependent packages ==== <!--T:35--> | ==== Installing dependent packages ==== <!--T:35--> | ||
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You can also verify that the package is available from the wheelhouse with [[Python#Available_wheels|avail_wheels]] command or by searching on [[Available Python wheels]] page. | You can also verify that the package is available from the wheelhouse with [[Python#Available_wheels|avail_wheels]] command or by searching on [[Available Python wheels]] page. | ||
=== Installing many packages === | |||
When installing multiple packages, it is best to install them in one command when possible: | |||
{{Commands | |||
|prompt=(ENV) [name@server ~] | |||
|pip install --upgrade pip | |||
|pip install package1 package2 package3 package4 | |||
}} | |||
as this help <tt>pip</tt> resolve dependencies issues. | |||
=== My virtual environment was working yesterday but not anymore === | |||
Packages are often updated and this lead to a non-reproducible virtual environment. To remedy that, one should pin the specific packages and their versions with | |||
{{Commands | |||
|prompt=(ENV) [name@server ~] | |||
|pip install --upgrade pip | |||
|pip install --no-index package1{{=}}{{=}}X.Y package2{{=}}{{=}}X.Y.Z package3<X.Y package4>X.Y | |||
}} | |||
and then create a [[Python#Creating_virtual_environments_inside_of_your_jobs|requirements file]] to install from when submitting jobs. | |||
</translate> | </translate> | ||